Junk bond exchange-traded funds haven't been tracking their indexes closely, and maybe you're better off with an active manager anyhow -- Joe Rennison and Robin Wigglesworth, Financial Times Five things to know about ETF fund flows in October -- Eric Balchunas, Bloomberg Wally Weitz sold out of Valeant Pharmaceuticals International (VRX) -- Chris Dieterich, Barron's Is the war for ETF volume across exchanges good for investors? Maybe not -- Rich Baert, Pensions & Investments The Vanguard FTSE Emerging Market ETF (VWO) has started buying China A-shares --...